package com.itheima.mapper;

import com.itheima.pojo.Clazz;
import com.itheima.pojo.Student;
import com.itheima.pojo.StudentQueryParam;
import org.apache.ibatis.annotations.*;

import java.util.List;
import java.util.Map;

@Mapper
public interface StudentMapper {


    List<Student> list(StudentQueryParam param);


//    @Select(" select s.name, s.no,s.gender,  s.phone,s.id_card,s.is_college,s.address,s.degree,s.graduation_date, clazz_id   from student s where #{id}")
//    Object getById(Integer id);


    @Insert("insert into student(name,no,gender,phone,id_card,is_college,address,degree,graduation_date,clazz_id,create_time, update_time) values(#{name},#{no},#{gender},#{phone},#{idCard},#{isCollege},#{address},#{degree},#{graduationDate},#{clazzId},#{createTime},#{updateTime})")
    void insert(Student student);
//    @Select("select name,no,gender,phone,id_card,is_college,address,degree,graduation_date,clazz_id from student where id=#{id}")
//    Student getById(Integer id);

    /**
     * 根据ID查询学生信息
     */
    @Select("select * from student where id = #{id}")
    Student getById(Integer id);

    void delete(List<Integer> ids);

    void update(Student student);

    @Update("update student set violation_count = violation_count + 1 , violation_score = violation_score + #{score} , update_time = now() where id = #{id}")
    void updateViolation(Integer id, Integer score);
    @Select("select count(*) from student where clazz_id = #{id}")
    Integer countByClazzId(Integer id);

    /**
     * 统计班级人数
     */
    @Select("select c.name cname , count(s.id) scount from class c  left join student s on s.clazz_id = c.id group by c.name order by count(s.id) desc ")
    List<Map<String,Object>> getStudentCount();

    /**
     * 统计学员学历
     */
    @MapKey("name")
    List<Map> countStudentDegreeData();
}
